/*
 * Thickbox 2.1 - jQuery plugin for displaying content in a box above the page ( http://jquery.com/demo/thickbox/ )
 * 
 * Copyright (c) 2006, 2007 Cody Lindley (http://www.codylindley.com)
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */
// on page load call TB_init
$(document).ready(TB_init);
// add thickbox to href elements that have a class of .thickbox
function TB_init(){
  $("a.thickbox").click(function(event){
    // stop default behaviour
    event.preventDefault();
    // remove click border
    this.blur();
  
    // get caption: either title or name attribute
    var caption = this.title || this.name || "";
    
    // get rel attribute for image groups
    var group = this.rel || false;
    
    // display the box for the elements href
    TB_show(caption, this.href, group);
  });
}
// called when the user clicks on a thickbox link
function TB_show(caption, url, rel) {
  // create iframe, overlay and box if non-existent
  if ( !$("#TB_HideSelect").length ) {
    $("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
    $("#TB_overlay").click(TB_remove);
  }
  // TODO replace or check if event is already assigned
  $(window).scroll(TB_position);
  
  // TODO replace
  TB_overlaySize();
  
  // TODO create loader only once, hide and show on demand
  $("body").append("<div id='TB_load'><img src='image/loadingAnimation.gif' /></div>");
  TB_load_position();
  
  // check if a query string is involved
  var baseURL = url.match(/(.+)?/)[1] || url;
  // regex to check if a href refers to an image
  var imageURL = /\.(jpe?g|png|gif|bmp)/gi;
  // check for images
  if ( baseURL.match(imageURL) ) {
    var dummy = { caption: "", url: "", html: "" };
    
    var prev = dummy,
      next = dummy,
      imageCount = "";
      
    // if an image group is given
    if ( rel ) {
      function getInfo(image, id, label) {
        return {
          caption: image.title,
          url: image.href,
          html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"
        }
      }
    
      // find the anchors that point to the group
      var imageGroup = $("a[@rel="+rel+"]").get();
      var foundSelf = false;
      
      // loop through the anchors, looking for ourself, saving information about previous and next image
      for (var i = 0; i < imageGroup.length; i++) {
        var image = imageGroup[i];
        var urlTypeTemp = image.href.match(imageURL);
        
        // look for ourself
        if ( image.href == url ) {
          foundSelf = true;
          imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);
        } else {
          // when we found ourself, the current is the next image
          if ( foundSelf ) {
            next = getInfo(image, "next", "Next &gt;");
            // stop searching
            break;
          } else {
            // didn't find ourself yet, so this may be the one before ourself
            prev = getInfo(image, "prev", "&lt; Prev");
          }
        }
      }
    }
    
    imgPreloader = new Image();
    imgPreloader.onload = function() {
      imgPreloader.onload = null;
      // Resizing large images
      var pagesize = TB_getPageSize();
      var x = pagesize[0] - 150;
      var y = pagesize[1] - 150;
      var imageWidth = imgPreloader.width;
      var imageHeight = imgPreloader.height;
      if (imageWidth > x) {
        imageHeight = imageHeight * (x / imageWidth); 
        imageWidth = x; 
        if (imageHeight > y) { 
          imageWidth = imageWidth * (y / imageHeight); 
          imageHeight = y; 
        }
      } else if (imageHeight > y) { 
        imageWidth = imageWidth * (y / imageHeight); 
        imageHeight = y; 
        if (imageWidth > x) { 
          imageHeight = imageHeight * (x / imageWidth); 
          imageWidth = x;
        }
      }
      // End Resizing
      
      // TODO don't use globals
      TB_WIDTH = imageWidth + 30;
      TB_HEIGHT = imageHeight + 60;
      
      // TODO empty window content instead
      $("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>");
      
      $("#TB_closeWindowButton").click(TB_remove);
      
      function buildClickHandler(image) {
        return function() {
          $("#TB_window").remove();
          $("body").append("<div id='TB_window'></div>");
          TB_show(image.caption, image.url, rel);
          return false;
        };
      }
      var goPrev = buildClickHandler(prev);
      var goNext = buildClickHandler(next);
      if ( prev.html ) {
        $("#TB_prev").click(goPrev);
      }
      
      if ( next.html ) {    
        $("#TB_next").click(goNext);
      }
      
      // TODO use jQuery, maybe with event fix plugin, or just get the necessary parts of it
      document.onkeydown = function(e) {
        if (e == null) { // ie
          keycode = event.keyCode;
        } else { // mozilla
          keycode = e.which;
        }
        switch(keycode) {
        case 27:
          TB_remove();
          break;
        case 190:
          if( next.html ) {
            document.onkeydown = null;
            goNext();
          }
          break;
        case 188:
          if( prev.html ) {
            document.onkeydown = null;
            goPrev();
          }
          break;
        }
      }
      
      // TODO don't remove loader etc., just hide and show later
      TB_position();
      $("#TB_load").remove();
      $("#TB_ImageOff").click(TB_remove);
      
      // for safari using css instead of show
      // TODO is that necessary? can't test safari
      $("#TB_window").css({display:"block"});
    }
    imgPreloader.src = url;
    
  } else { //code to show html pages
    
    var queryString = url.match(/\?(.+)/)[1];
    var params = TB_parseQuery( queryString );
    
    TB_WIDTH = (params['width']*1) + 30;
    TB_HEIGHT = (params['height']*1) + 40;
    var ajaxContentW = TB_WIDTH - 30,
      ajaxContentH = TB_HEIGHT - 45;
    
    if(url.indexOf('TB_iframe') != -1){        
      urlNoQuery = url.split('TB_');    
      $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' onload='TB_showIframe()'> </iframe>");
    } else {
      $("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");
    }
        
    $("#TB_closeWindowButton").click(TB_remove);
    
      if(url.indexOf('TB_inline') != -1){  
        $("#TB_ajaxContent").html($('#' + params['inlineId']).html());
        TB_position();
        $("#TB_load").remove();
        $("#TB_window").css({display:"block"}); 
      }else if(url.indexOf('TB_iframe') != -1){
        TB_position();
        if(frames['TB_iframeContent'] == undefined){//be nice to safari
          $("#TB_load").remove();
          $("#TB_window").css({display:"block"});
          $(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });
        }
      }else{
        $("#TB_ajaxContent").load(url, function(){
          TB_position();
          $("#TB_load").remove();
          $("#TB_window").css({display:"block"}); 
        });
      }
    
  }
  
  $(window).resize(TB_position);
  
  document.onkeyup = function(e){   
    if (e == null) { // ie
      keycode = event.keyCode;
    } else { // mozilla
      keycode = e.which;
    }
    if(keycode == 27){ // close
      TB_remove();
    }  
  }
    
}
//helper functions below
function TB_showIframe(){
  $("#TB_load").remove();
  $("#TB_window").css({display:"block"});
}
function TB_remove() {
   $("#TB_imageOff").unbind("click");
  $("#TB_overlay").unbind("click");
  $("#TB_closeWindowButton").unbind("click");
  $("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});
  $("#TB_load").remove();
  return false;
}
function TB_position() {
  var pagesize = TB_getPageSize();  
  var arrayPageScroll = TB_getPageScrollTop();
  var style = {width: TB_WIDTH, left: (arrayPageScroll[0] + (pagesize[0] - TB_WIDTH)/2), top: (arrayPageScroll[1] + (pagesize[1]-TB_HEIGHT)/2)};
  $("#TB_window").css(style);
}
function TB_overlaySize(){
  if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX) {  
    yScroll = window.innerHeight + window.scrollMaxY;
    xScroll = window.innerWidth + window.scrollMaxX;
    var deff = document.documentElement;
    var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;
    var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;
    xScroll -= (window.innerWidth - wff);
    yScroll -= (window.innerHeight - hff);
  } else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){ // all but Explorer Mac
    yScroll = document.body.scrollHeight;
    xScroll = document.body.scrollWidth;
  } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
    yScroll = document.body.offsetHeight;
    xScroll = document.body.offsetWidth;
    }
  $("#TB_overlay").css({"height": yScroll, "width": xScroll});
  $("#TB_HideSelect").css({"height": yScroll,"width": xScroll});
}
function TB_load_position() {
  var pagesize = TB_getPageSize();
  var arrayPageScroll = TB_getPageScrollTop();
  $("#TB_load")
    .css({left: (arrayPageScroll[0] + (pagesize[0] - 100)/2), top: (arrayPageScroll[1] + ((pagesize[1]-100)/2)) })
    .css({display:"block"});
}
function TB_parseQuery ( query ) {
  // return empty object
  if( !query )
    return {};
  var params = {};
  
  // parse query
  var pairs = query.split(/[;&]/);
  for ( var i = 0; i < pairs.length; i++ ) {
    var pair = pairs[i].split('=');
    if ( !pair || pair.length != 2 )
      continue;
    // unescape both key and value, replace "+" with spaces in value
    params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');
   }
   return params;
}
function TB_getPageScrollTop(){
  var yScrolltop;
  var xScrollleft;
  if (self.pageYOffset || self.pageXOffset) {
    yScrolltop = self.pageYOffset;
    xScrollleft = self.pageXOffset;
  } else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft ){   // Explorer 6 Strict
    yScrolltop = document.documentElement.scrollTop;
    xScrollleft = document.documentElement.scrollLeft;
  } else if (document.body) {// all other Explorers
    yScrolltop = document.body.scrollTop;
    xScrollleft = document.body.scrollLeft;
  }
  arrayPageScroll = new Array(xScrollleft,yScrolltop) 
  return arrayPageScroll;
}
function TB_getPageSize(){
  var de = document.documentElement;
  var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
  var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight
  arrayPageSize = new Array(w,h) 
  return arrayPageSize;
}